STP540

    How and What to Sample in the Analytical Gap

    Published: Jan 1973


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    Abstract

    The possibility of obtaining greater optimization of spectrochemical techniques by selectively isolating radiation from the analytical spark gap is discussed. Instrumental factors required to achieve positional stability of the spark necessary for these techniques are discussed in terms of the chemical reactions controlling spark formation. Using simple optical systems capable of viewing the spark differentially, emission profiles of several metallic and sparking-gas species have been recorded. The heterogeneous spatial and temporal structure in these profiles has been employed to group the spectral lines into classes according to when and where they appear in the discharge. Suggestions are made as to how the spark may be viewed to isolate lines of one class from those of other classes, thereby reducing background and line interferences and enhancing signal-to-noise ratios.

    Keywords:

    spark emission spectroscopy, spectrochemical analysis, time resolved spectroscopy, sampling


    Author Information:

    Walters, JP
    Professor and research assistant, University of WisconsinAmes Laboratory USAEC, Iowa State University, MadisonAmes, Wis.Iowa

    Goldstein, SA
    Professor and research assistant, University of WisconsinAmes Laboratory USAEC, Iowa State University, MadisonAmes, Wis.Iowa


    Paper ID: STP34747S

    Committee/Subcommittee: E02.04

    DOI: 10.1520/STP34747S


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